Where do planets and moons get orbital velocity from?

A captured moon will typically possess an orbital velocity that was initially established by the spinning protoplanetary disk from which it formed. read more

All objects in the Solar System or, indeed, in any stellar system or galaxy, get their orbital velocity and their spin from the net angular momentum of the molecular cloud of gas and dust that gravitationally collapsed to create the system. read more

Below is a list of the planet’s orbital speeds in order from fastest to slowest. 1. Mercury is the fastest planet, which speeds around the sun at 47.87 km/s. In miles per hour this equates to a whopping 107,082 miles per hour. 2. Venus is the second fastest planet with an orbital speed of 35.02 km/s, or 78,337 miles per hour. 3. read more

The planets move according Johannes Kepler's "Laws of Planetary Motion" The First Law describes the shape of the orbit. The Second Law describes the way an object's speed varies along its orbit. read more